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A novel satellite image encryption algorithm based on hyperchaotic systems and Josephus problem
Advances in Space Research ( IF 2.177 ) Pub Date : 2021-01-20 , DOI: 10.1016/j.asr.2021.01.018
M. Naim; A. Ali Pacha; C. Serief

With the rapid growth of the number of Earth observation satellite (EOS) supporting critical applications, it is required to improve the security techniques to protect the sensitive data and images during the transmission between the satellites and the ground stations. This paper introduces a new satellite image encryption algorithm based on the Linear Feedback Shift Register (LFSR) generator, SHA 512 hash function, hyperchaotic systems, and Josephus problem. LFSR generates a matrix that is used to construct the 512-bits value of the hash function. These bits are used to set the initial values and parameters of the proposed encryption algorithm. Firstly, the six dimensions (6-D) hyperchaotic system is divided into three parts, where every two equations are considered as one part. Secondly, the 1-D hyperchaotic logistic-tent system is considered as the controller to select one part. The selected part is used to generate a matrix that is XORed with the original image. Thirdly, the scrambling operation by Josephus sequences is applied to the output of the previous step by scrambling the rows and the columns according to the selected part to produce the pre-encrypted image. Finally, if the number of iterations is less than the required number which is considered as a parameter of the secret key, the previous operations will be repeated in the pre-encrypted image; otherwise, the pre-encrypted image is considered as the final cipher image. Experimental and analyses results show that the proposed algorithm has good performance in terms of high level of security, large enough key-space, tolerance to Single Event Upsets (SEU) as well as low time complexity.



中文翻译:

基于超混沌系统和约瑟夫斯问题的卫星图像加密新算法

随着支持关键应用的对地观测卫星(EOS)数量的快速增长,需要改进安全技术,以保护在卫星与地面站之间传输期间的敏感数据和图像。本文介绍了一种新的基于线性反馈移位寄存器(LFSR)生成器,SHA 512哈希函数,超混沌系统和约瑟夫斯问题的卫星图像加密算法。LFSR生成一个矩阵,该矩阵用于构造哈希函数的512位值。这些位用于设置建议的加密算法的初始值和参数。首先,将六维(6-D)超混沌系统分为三个部分,其中每两个方程被视为一个部分。其次,一维超混沌逻辑帐篷系统被认为是选择一个部分的控制器。选定的部分用于生成与原始图像异或的矩阵。第三,通过根据选择的部分对行和列进行加扰以产生预加密的图像,将约瑟夫斯序列的加扰操作应用于前一步的输出。最后,如果迭代次数少于所需的次数(被视为密钥的参数),则先前的操作将在预加密的图像中重复;否则,将预加密的图像视为最终密码图像。实验和分析结果表明,该算法在安全性高,密钥空间足够大,

更新日期:2021-02-22
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